Method to measure non-invasive blood pressure from patient sensor system

Abstract

A system and method for enhancing the determination of the blood pressure of a patient is disclosed. The system includes a wireless blood pressure sensing device that obtains blood pressure data from the patient and wirelessly transmits the data to a host system. The host system receives at least one other physiological parameter from the patient and can retrieve historical information about the patient. Based upon the blood pressure data, physiological parameter and historic data, the host system utilizes a multi-parameter algorithm to calculate a remote blood pressure reading. The blood pressure sensing device calculates a local blood pressure reading based upon the obtained blood pressure data. The host system communicates with the blood pressure sensing device to modify operation of the blood pressure sensing device based upon the at least one physiological parameter other than blood pressure, the historic patient information as well as the calculated remote reading.

I claim: 
     
         1 . A system for monitoring blood pressure in a patient, comprising:
 a blood pressure sensing device configured to be worn by a patient, the blood pressure sensing device including a sensor to obtain blood pressure data from the patient and a transceiver operable to wirelessly transmit the blood pressure data;   a patient sensing device for obtaining a physiological parameter from the patient; and   a host system positioned to receive the transmitted blood pressure data and the physiological parameter, the host system including a host processor operable to calculate a remote blood pressure reading for the patient based on the received blood pressure data and the physiological parameter.   
     
     
         2 . The system of  claim 1  wherein the blood pressure sensing device further includes a control unit operable to calculate a local blood pressure reading based on the blood pressure data. 
     
     
         3 . The system of  claim 1  wherein the physiological parameter is an ECG signal. 
     
     
         4 . The system of  claim 1  wherein the physiological parameter is an SPO2 signal. 
     
     
         5 . The system of  claim 1  wherein at least one of the blood pressure sensing device and the patient sensing device includes an accelerometer that generates an orientation signal that is received by the host system. 
     
     
         6 . The system of  claim 1  wherein the physiological parameter from the patient is the orientation of the patient. 
     
     
         7 . The system of  claim 1  wherein the host system is operable to retrieve patient data from a remote medical record for the patient, wherein the host processor calculates the remote blood pressure based on the received blood pressure data, the at least one physiological parameter and the retrieved patient data. 
     
     
         8 . The system of  claim 2  wherein the host system is operable to generate control information received by the blood pressure monitoring device, wherein the control information is used to modify the calculation of the local blood pressure reading. 
     
     
         9 . The system of  claim 1  wherein the patient sensing device is configured to be worn by the patient and wirelessly transmit the physiological parameter. 
     
     
         10 . The system of  claim 1  wherein the blood pressure sensing device includes a pressure transducer operable to detect oscillometric pulses from the patient and a blood pressure cuff positionable on the patient. 
     
     
         11 . A method of determining the blood pressure of a patient comprising the steps of:
 positioning a blood pressure sensing device on the patient;   obtaining blood pressure data from the patient;   wirelessly transmitting the blood pressure data from the blood pressure sensing device;   receiving the transmitted blood pressure data at a host system;   receiving a physical parameter related to the patient at the host system;   operating a host processor to determine a remote blood pressure reading for the patient based on the received blood pressure data and the received physical parameter.   
     
     
         12 . The method of  claim 11  wherein the blood pressure sensing device further includes a control unit operable to calculate a local blood pressure reading based on the blood pressure data. 
     
     
         13 . The method of  claim 11  wherein the physiological parameter is an ECG signal. 
     
     
         14 . The method of  claim 11  wherein the physiological parameter is an SPO2 signal. 
     
     
         15 . The method of  claim 11  further comprising the step of retrieving patient data from a remote medical record for the patient, wherein the host processor calculates the remote blood pressure based on the received blood pressure data, the at least one physiological parameter and the retrieved patient data. 
     
     
         16 . The method of  claim 12  wherein the host system generates control information that is received by the blood pressure monitoring device, wherein the control information modifies the calculation of the local blood pressure reading. 
     
     
         17 . The method of  claim 11  wherein the patient sensing device is configured to be worn by the patient and wirelessly transmit the physiological parameter. 
     
     
         18 . The method of  claim 11  wherein the blood pressure sensing device includes a pressure transducer operable to detect oscillometric pulses from the patient and a blood pressure cuff positionable on the patient. 
     
     
         19 . The method of  claim 11  wherein at least one of the blood pressure sensing device and the patient sensing device includes an accelerometer that generates an orientation signal that is received by the host system. 
     
     
         20 . The method of  claim 11  wherein the physiological parameter from the patient is the orientation of the patient.